Simulating and Evaluating a Real-World ElasticSearch System Using the RECAP DES Simulator

Simulation has become an indispensable technique for modelling and evaluating the performance of large-scale systems efficiently and at a relatively low cost. ElasticSearch (ES) is one of the most popular open source large-scale distributed data indexing systems worldwide. In this paper, we use the RECAP Discrete Event Simulator (DES) simulator, an extension of CloudSimPlus, to model and evaluate the performance of a real-world cloud-based ES deployment by an Irish small and medium-sized enterprise (SME), Opening.io. Following simulation experiments that explored how much query traffic the existing Opening.io architecture could cater for before performance degradation, a revised architecture was proposed, adding a new virtual machine in order to dissolve the bottleneck. The simulation results suggest that the proposed improved architecture can handle significantly larger query traffic (about 71% more) than the current architecture used by Opening.io. The results also suggest that the RECAP DES simulator is suitable for simulating ES systems and can help companies to understand their infrastructure bottlenecks under various traffic scenarios and inform optimisation and scalability decisions.

Everything You Always Wanted to Know About BGPv4 in OMNeT++ But Were Afraid to Ask

Border Gateway Protocol is one and only one exterior gateway protocol for routing between autonomous systems, which basically glues the Internet together. This paper outlines BGPv4 theory and its (re)implementations in OMNeT++ discrete event simulator. This effort extends IPv6 capabilities of INET4 framework and improves the accuracy of relevant simulation models.